Roof purline node

By designing roof purlin nodes with elongated holes and pads on the supporting beams and purlins, the problem of purlin displacement caused by steel beam deformation is solved, enabling flexible adjustment and precise installation of the purlins, and improving the construction efficiency and structural stability of large buildings.

CN223907769UActive Publication Date: 2026-02-13CHINA RAILWAY SEVENTH GRP CO LTD +1
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202520299566.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-24
Publication Date
2026-02-13
Estimated Expiration
2035-02-24

AI Technical Summary

Technical Problem

In the construction of large buildings, the deformation of steel beams due to their own weight can cause purlin displacement, affecting the installation accuracy of roof panels and making on-site adjustments difficult, thus increasing construction costs and time.

Method used

Design a roof purlin node comprising a support beam, purlins and connectors. By setting elongated holes and pads on the support beam and purlins, the relative position of the purlins on the support beam can be adjusted, and the purlins can be fixed by bolt connection.

Benefits of technology

It improves the stability and safety of the structure, reduces installation difficulty and construction costs, ensures that the purlins can be precisely aligned after deformation, and improves construction efficiency and overall structural reliability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223907769U_ABST
    Figure CN223907769U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of steel structure buildings, in particular to a roof purline node which comprises a supporting beam, a purline and a connecting piece. A first long hole is formed in the supporting beam; a second long hole is formed in the purline; one end of the connecting piece is connected to the first long hole in the supporting beam through a bolt, and the other end of the connecting piece is connected to the second long hole in the purline through a bolt. At the beginning, bolt connection is loosened, and the relative position of the purline can be adjusted on the supporting beam in the extending direction of the first long hole and / or the extending direction of the second long hole. According to the roof purline node provided by the embodiment of the invention, through the arrangement of the first long hole and the second long hole, the relative position of the purline on the supporting beam is allowed to be adjusted when the supporting beam deforms. By means of the design, the whole structure can better adapt to deformation of a large-span structure caused by the self-weight load effect after construction is completed, and therefore the stability and safety of the structure are enhanced.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure, in particular to a roof purlin node. BACKGROUND

[0002] When constructing large buildings (such as stadiums, airports, etc.), large-span steel structures are often used to support the roof. In particular, when the roof is inclined (slope roof), a difficult problem is encountered: due to the weight of the structure itself, the steel beam will bend and deform, causing the purlin (small beam supporting the roof panel) to displace along the slope direction.

[0003] The traditional method is to directly weld the purlin on the steel beam, but this method has obvious defects:

[0004] 1. After the deformation of the steel beam, the purlin will also move, affecting the installation accuracy of the subsequent roof panel.

[0005] 2. Because the roof panel is usually prefabricated in advance, on-site adjustment is very difficult, increasing the construction cost and time. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to provide a roof purlin node in which the purlin can adjust the relative position to adapt to the deformation of the large-span structure due to the self-weight load after the construction is completed.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a roof purlin node, comprising:

[0008] A support beam is provided with a first long hole;

[0009] A purlin is cross arranged on the support beam, and the purlin is provided with a second long hole;

[0010] A connecting piece is bolted at one end to the first long hole on the support beam, and at the other end to the second long hole on the purlin;

[0011] At the initial time, the bolt connection is loose, and the purlin can adjust the relative position along the extension direction of the first long hole and / or the extension direction of the second long hole on the support beam. After the bolt is tightened, the support beam and the purlin are fixedly connected to the connecting piece.

[0012] In the optional embodiment, it further comprises:

[0013] A first pad is fixedly arranged on the support beam at the first long hole, the first long hole penetrates the first pad, and the first pad is located between the support beam and one end of the connecting piece.

[0014] In an optional embodiment, further comprising:

[0015] A second pad block is fixedly arranged at the second long hole of the purlin, the second long hole penetrates through the second pad block, and the second pad block is located between the purlin and the other end of the connecting piece.

[0016] In an optional embodiment, the length direction of the first long hole is parallel to the support beam.

[0017] In an optional embodiment, the first long hole is provided with at least two.

[0018] Among the at least two first long holes, the first long holes are sequentially and spacedly arranged along a direction parallel to the length of the first long hole, or sequentially and spacedly arranged along a direction perpendicular to the length of the first long hole.

[0019] In an optional embodiment, the length direction of the second long hole is parallel to the purlin.

[0020] In an optional embodiment, the second long hole is provided with at least two.

[0021] Among the at least two second long holes, the second long holes are sequentially and spacedly arranged along a direction parallel to the length of the second long hole, or sequentially and spacedly arranged along a direction perpendicular to the length of the second long hole.

[0022] In an optional embodiment, the purlin is a hollow cuboid structure.

[0023] In an optional embodiment, the support beam is a channel steel, the channel steel has a channel bottom wall and a channel side wall, and the purlin is mounted on the channel side wall.

[0024] In an optional embodiment, the number of channel steels is two, and the adjacent channel steels are fixedly connected in parallel.

[0025] The roof purlin node provided by the embodiment of the present application allows the relative position of the purlin on the support beam to be adjusted when the support beam deforms, by arranging the first long hole and the second long hole. This design enables the entire structure to better adapt to the deformation of the large-span structure caused by the dead load after the construction is completed, thereby enhancing the stability and safety of the structure.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0028] Figure 1 A structural schematic diagram of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0029] Figure 2 A structural schematic diagram of a support beam of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0030] Figure 3 A structural schematic diagram of a purlin of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0031] Figure 4 A structural schematic diagram of a purlin first pad of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0032] Figure 5 A structural schematic diagram of a purlin second pad of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0033] Figure 6 A structural schematic diagram of a purlin second pad and a purlin of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0034] Figure 7 A structural schematic diagram of a purlin first pad and a support beam of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0035] Figure 8 A structural schematic diagram of a connecting piece of a roof purlin node according to one of the embodiments of the present application is shown in one view.

[0036] Figure:

[0037] 100 - support beam; 110 - first long hole; 120 - channel steel; 122 - channel bottom wall; 124 - channel side wall;

[0038] 200 - purlin; 210 - second long hole;

[0039] 300 - connecting piece; 310 - first pad; 320 - second pad. DETAILED DESCRIPTION

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The embodiments of the present application provide a roof purlin node, as shown in the drawings, the roof purlin node comprises a support beam 100, a purlin 200 and a connecting piece 300. Figure 1 As shown in the drawings, the support beam 100 is provided with a first long hole 110.

[0044] As shown in the drawings, the support beam 100 is provided with a first long hole 110. Figure 2 As shown in the drawings, the support beam 100 is provided with a first long hole 110.

[0045] As shown in the drawings, the support beam 100 is provided with a first long hole 110. Figure 1 As shown in the drawings, the support beam 100 is provided with a first long hole 110. Figure 3 As shown in the drawings, the support beam 100 is provided with a first long hole 110.

[0046] As shown in the drawings, the support beam 100 is provided with a first long hole 110. Figure 1 As shown in the drawings, the support beam 100 is provided with a first long hole 110.

[0047] Exemplarily, as shown in the drawings, the support beam 100 is provided with a first long hole 110. Figure 8As shown, the connecting piece 300 includes a first plate body and a second plate body, which are fixedly connected vertically. The first plate body is one end of the connecting piece 300, and the first plate body is connected with the support beam 100. The second plate body is the other end of the connecting piece 300, and the second plate body is connected with the purlin 200.

[0048] After the large-span structure is completed, the structure will deform under the action of self-weight load. When the support beam 100 deforms, the relative position of the purlin 200 on the support beam 100 can be adjusted through the first long hole 110 and the second long hole 210. The specific process is, for example:

[0049] First, the support beam 100 is erected, then the purlin 200 is installed on the support beam 100, and then the connecting piece 300 is installed, so that the purlin 200 and the support beam 100 are bolted through the connecting piece 300. At the beginning, the bolt connection is loose, and the purlin 200 can adjust the relative position on the support beam 100 along the extension direction of the first long hole 110 and the extension direction of the second long hole 210. After the purlin 200 is adjusted to the appropriate position, the bolt is tightened, and the support beam 100 and the purlin 200 are fixedly connected to the connecting piece 300. Then the connecting piece 300 is welded and fixed, and the roof panel is installed on the purlin 200.

[0050] Compared with the prior art, the roof purlin node provided by the embodiment of the application allows the relative position of the purlin 200 on the support beam 100 to be adjusted when the support beam 100 deforms, by providing the first long hole 110 and the second long hole 210. This design enables the entire structure to better adapt to the deformation of the large-span structure caused by the self-weight load after the construction is completed, thereby enhancing the stability and safety of the structure.

[0051] By adjusting the relative position of the purlin 200 on the support beam 100, it can be ensured that the purlin 200 is in the best installation position, thereby improving the precision of the entire structure. This helps to reduce structural problems caused by improper installation, and improves the reliability and durability of the overall structure.

[0052] Because the position of the purlin 200 can be flexibly adjusted, the roof panel can be easily installed on the purlin 200, reducing the difficulty of installation. This not only improves the construction efficiency, but also helps to reduce errors and rework during installation, thereby reducing the construction cost.

[0053] As shown in the drawings, Figure 4 In one embodiment, the roof purlin node further includes a first pad 310; as shown in the drawings, Figure 7 The first pad 310 is fixedly arranged at the first long hole 110 on the support beam 100, and the first long hole 110 penetrates the first pad 310; as shown in the drawings, Figure 1As shown, the first pad 310 is located between one end of the support beam 100 and the connector 300.

[0054] For example, such as Figure 1 As shown, the first elongated hole 110 also passes through the first plate of the connector 300, and the bolt passes through the first elongated hole 110, as well as through the first plate, the first pad 310 and the support beam 100.

[0055] The first pad 310 provides additional support and reinforcement to the support beam 100, especially in the connection area between the connector 300 and the support beam 100. This helps to distribute the concentrated pressure of the connector 300 on the support beam 100, reduce local deformation of the support beam 100, and thus improve the stability and load-bearing capacity of the entire structure.

[0056] Because the first pad 310 is located between the support beam 100 and the connector 300, it provides a flatter and more stable contact surface, allowing the connector 300 to be more securely fixed to the support beam 100. This helps ensure a more reliable connection between the connector 300 and the support beam 100, reducing structural problems caused by loosening or failure of the connection.

[0057] Bolts are inserted through the first elongated hole 110, the first plate, the first pad 310, and the support beam 100. This design makes the bolted connection more stable. The addition of the first pad 310 increases the contact area of ​​the bolted connection, improves the tensile and shear strength of the bolts, and thus enhances the stability and durability of the entire connection.

[0058] like Figure 5 As shown, in one embodiment, the roof purlin node also includes a second pad 320; as Figure 6 As shown, the second pad 320 is fixedly installed at the second elongated hole 210 on the purlin 200, and the second elongated hole 210 penetrates the second pad 320.

[0059] like Figure 1 As shown, the second pad 320 is located between the other end of the purlin 200 and the connector 300.

[0060] For example, the second elongated hole 210 penetrates the second plate of the purlin 200, the second pad 320 and the connector 300, and bolts are inserted in these components.

[0061] For example, the second pad 320 is fixedly connected to the purlin 200 by welding or other means.

[0062] The second pad 320 provides additional support and reinforcement for the connection between the purlin 200 and the connecting piece 300. By fixing the second pad 320 at the second long hole 210, the connection strength between the purlin 200 and the connecting piece 300 can be significantly improved, making the entire structure more stable and reliable.

[0063] Since the second long hole 210 penetrates through the purlin 200, the second pad 320 and the second plate body of the connecting piece 300, the bolt can pass through these components to achieve fastening connection. The addition of the second pad 320 increases the contact area of the bolt connection, improves the fastening effect and tensile capacity of the bolt, and thus enhances the stability of the entire connection.

[0064] The arrangement of the second pad 320 can also optimize the stress distribution of the entire structure. After adding the second pad 320 between the connecting piece 300 and the purlin 200, the pressure of the connecting piece 300 on the purlin 200 can be more evenly distributed on the entire contact surface, reducing the concentration of local stress, thereby improving the carrying capacity of the entire structure.

[0065] As shown in FIG. 1, in one embodiment, the length direction of the first long hole 110 is parallel to the support beam 100, allowing the purlin 200 to adjust the relative position along the length direction of the support beam 100. Figure 2

[0066] Through the design of the first long hole 110, the purlin 200 can be fine-tuned along the length direction of the support beam 100 to adapt to different installation requirements or site conditions. This flexibility helps to ensure accurate alignment between the purlin 200 and the support beam 100, thereby improving the stability and reliability of the entire structure.

[0067] In actual application, due to differences in site conditions or design requirements, the relative position between the purlin 200 and the support beam 100 may need to be adjusted. The design of the first long hole 110 makes such adjustment simple and easy to implement without the need for large-scale modification of the entire structure, thereby optimizing the structural layout and improving construction efficiency.

[0068] In some cases, due to factors such as thermal expansion and contraction, load changes, etc., the relative position between the purlin 200 and the support beam 100 may change. The design of the first long hole 110 allows such changes to be compensated to some extent, thereby enhancing the adaptability of the structure and reducing the risk of structural damage due to deformation or displacement.

[0069] As shown in FIG. 1, in one embodiment, the first long hole 110 is provided with at least two. Exemplarily, the first long hole 110 is provided with two, four, six or eight, etc. Figure 2

[0070] ​​In one embodiment, at least two first long holes 110 are arranged in sequence along a direction perpendicular to the length of the first long hole 110. For example, two first long holes 110 are arranged in sequence along a direction perpendicular to the length of the first long hole 110.

[0071] As shown in FIG. 1, in one embodiment, at least two first long holes 110 are arranged in sequence along a direction parallel to the length of the first long hole 110. Figure 2 As shown in FIG. 1, in one embodiment, at least two first long holes 110 are arranged in sequence along a direction perpendicular to the length of the first long hole 110.

[0072] Figure 2 As shown in FIG. 1, in one embodiment, six first long holes 110 are arranged, and the six first long holes 110 are divided into two groups, each group having three first long holes 110, the three first long holes 110 in the same group being arranged in sequence along a direction parallel to the length of the first long hole 110, and the first long holes 110 of adjacent groups being arranged in sequence along a direction perpendicular to the length of the first long hole 110.

[0073] By arranging multiple first long holes 110 and arranging them in different directions, more connection points can be provided, thereby enhancing the connection stability and strength between the purlin 200 and the support structure. This helps to ensure the firmness of the entire structure and reduce the risk of structural failure due to unstable or insufficient connection.

[0074] The design of multiple first long holes 110 allows the purlin 200 to be connected and fixed at multiple positions, thereby improving the flexibility of installation. This helps to adapt to different site conditions and design requirements, ensuring that the purlin 200 can be accurately installed at the predetermined position.

[0075] By reasonably distributing the positions and number of first long holes 110, the layout and stress distribution of the entire structure can be optimized. This helps to reduce the occurrence of stress concentration and deformation, and improves the overall performance and durability of the structure.

[0076] As shown in FIG. 1, in one embodiment, the length direction of the second long hole 210 is parallel to the purlin 200. Figure 3

[0077] The design of the second long hole 210 parallel to the purlin 200 allows the purlin 200 to have certain adjustment space when connected. This flexibility is very useful for adapting to site conditions, ensuring accurate alignment, and compensating for manufacturing or installation errors.

[0078] As shown in FIG. 1, in one embodiment, at least two second long holes 210 are arranged. For example, two, four, six, or eight second long holes 210 are arranged. Figure 3

[0079] ​​​At least two of the second long holes 210 are arranged in sequence along a direction parallel to the length of the second long hole 210. For example, two second long holes 210 are arranged, and the two second long holes 210 are arranged in sequence along a direction parallel to the length of the second long hole 210.

[0080] In one embodiment, at least two of the second long holes 210 are arranged in sequence along a direction perpendicular to the length of the second long hole 210. For example, three second long holes 210 are arranged, and the three second long holes 210 are arranged in sequence along a direction perpendicular to the length of the second long hole 210.

[0081] In another embodiment, as shown in Figure 3 six second long holes 210 are arranged, and the six second long holes 210 are divided into two groups. In the same group, three second long holes 210 are arranged in sequence along a direction perpendicular to the length of the second long hole 210. Between adjacent groups, the second long holes 210 are arranged in sequence along a direction parallel to the length of the second long hole 210.

[0082] By arranging multiple second long holes 210 and arranging them in different directions, more connection points can be provided, thereby enhancing the connection reliability and stability of the structure. This helps to ensure that the structure can maintain stability under various loads and reduce the risk of structural failure due to unstable connections.

[0083] The design of multiple second long holes 210 allows the purlin 200 to have some adjustment space when connected, thereby enhancing the adaptability of the structure. This helps to adapt to different site conditions, design requirements, and load changes, ensuring that the structure can always be in the best working state.

[0084] As shown in Figure 1 In one embodiment, the purlin 200 is a hollow cuboid structure, which not only meets the stability requirements of large-span roof purlins, but also helps to reduce the weight of the purlin 200 and the entire roof purlin node, reducing the difficulty of construction.

[0085] The hollow cuboid structure can significantly reduce the weight of the purlin 200 compared to a solid structure. This not only reduces the self-weight of the individual purlin 200, but also reduces the weight of the entire roof purlin node, thereby reducing the load of the entire building structure.

[0086] The lighter purlin 200 is easier to carry and install, reducing labor intensity during construction. At the same time, the reduced weight also means that the lifting equipment and manpower required during installation can be reduced accordingly, thereby improving construction efficiency. The hollow structure can reduce the amount of material used, thereby saving material costs. This is particularly economically significant for large-scale construction projects. Although the purlin 200 is hollow, reasonable structural design can ensure that it has sufficient strength and rigidity to meet the load-bearing requirements. At the same time, the hollow structure also helps to distribute the load and improve the stability of the overall structure.

[0087] The hollow cuboid structure can form certain spaces inside, which can be used to accommodate other components or equipment, thereby optimizing space utilization.

[0088] As shown in Figure 1 and Figure 2 , in one embodiment, the support beam 100 is a channel steel 120, which has a channel bottom wall 122 and a channel side wall 124, and the purlin 200 is installed on the channel side wall 124.

[0089] The channel steel 120 provides good load-bearing capacity and bending and torsional resistance due to its unique cross-sectional shape (parallel grooves on both sides and a narrow and straight waist in the middle). This structural characteristic enables the channel steel 120 to withstand loads from above or the side when used as a support beam 100, ensuring the strength and stability of the overall structure.

[0090] The channel side wall 124 of the channel steel 120 provides an ideal attachment surface for the installation of the purlin 200. The purlin 200 can be conveniently installed on the channel side wall 124.

[0091] As shown in Figure 1 and Figure 2 , in one embodiment, the number of channel steels 120 is two, and the adjacent channel steels 120 are fixedly connected in parallel.

[0092] In this embodiment, the two channel steels 120 are arranged in parallel and fixedly connected, for example, by a fixed block, one end of the fixed block is fixedly connected to one channel steel 120, and the other end of the fixed block is fixedly connected to the other channel steel 120, for example, by welding, clamping, etc. Illustratively, the openings of the two channel steels 120 are arranged facing away from each other or towards each other. Illustratively, the two channel steels 120 are arranged with a spacing therebetween.

[0093] The parallel fixed connection of the two channel steels 120 can significantly improve the strength and stability of the overall structure. This design enables the mechanical structure to better resist external loads and deformation, thereby improving its safety and reliability.

[0094] The parallel and fixedly connected channel steel 120 forms a more solid support system, which can more effectively disperse and bear loads from different directions.

[0095] It should be noted that the features of the embodiments in the present application can be combined with each other without conflict.

[0096] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roof purlin node characterized by, The utility model relates to a support beam (100) is provided with first long hole (110) on the support beam (100), purlin (200) is provided with second long hole (210) on the purlin (200) is crossed and is provided on the support beam (100), the connecting piece (300) one end is bolted at first long hole (110) on the support beam (100), the other end of connecting piece (300) is bolted at second long hole (210) on the purlin (200), the purlin (200) can be adjusted relative position on the support beam (100) along the extension direction of first long hole (110) and / or the extension direction of second long hole (210) when bolt is connected and is loosened, and the support beam (100) and the purlin (200) are fixedly connected to connecting piece (300) after bolt is screwed. Further comprising: First pad (310) is fixedly arranged at first long hole (110) on the support beam (100), first long hole (110) penetrates first pad (310), and first pad (310) is located between the support beam (100) and one end of connecting piece (300). Further comprising: Second pad (320) is fixedly arranged at second long hole (210) on the purlin (200), second long hole (210) penetrates second pad (320), and second pad (320) is located between the purlin (200) and the other end of connecting piece (300).

2. The roof purlin node of claim 1, wherein The length direction of the first long hole (110) is parallel to the support beam (100). The first long hole (110) is provided with at least two; 3. The roof purlin node of claim 1, wherein Wherein at least two first long holes (110) are sequentially and spacedly distributed along the direction parallel to the length of the first long hole (110), or sequentially and spacedly distributed along the direction perpendicular to the length of the first long hole (110). The length direction of the second long hole (210) is parallel to the purlin (200).

4. The roof purlin node of claim 1, wherein The second long hole (210) is provided with at least two; 5. The roof purlin node of claim 4, wherein, Wherein at least two second long holes (210) are sequentially and spacedly distributed along the direction parallel to the length of the second long hole (210), or sequentially and spacedly distributed along the direction perpendicular to the length of the second long hole (210). The purlin (200) is a hollow cuboid structure.

6. The roof purlin node of claim 1, wherein The support beam (100) is a channel steel (120), the channel steel (120) has a groove bottom wall (122) and a groove side wall (124), and the purlin (200) is installed on the groove side wall (124).

7. The roof purlin node of claim 6, wherein, The number of the channel steel (120) is two, and the adjacent channel steels (120) are fixedly connected in parallel. ​ 8. The roof purlin node of claim 1, wherein, ​ 9. The roof purlin node of claim 1, wherein, ​ 10. The roof purlin node of claim 9, wherein, ​